EP 2104226 B1 20120627 - Wireless communication device
Title (en)
Wireless communication device
Title (de)
Drahtlose Kommunikationsvorrichtung
Title (fr)
Dispositif de communication sans fil
Publication
Application
Priority
JP 2008074124 A 20080321
Abstract (en)
[origin: EP2104226A2] A wireless communication device obtains an analog received signal by receiving a wireless signal, adjusts amplitude by a variable gain amplifier (107), converts the analog received signal into a digital received signal by an A/D converter (113) and obtains user data by demodulating (114) the digital received signal. The device includes a received signal strength indication detecting section (108) that detects a received signal strength indication that fluctuates over time; a gain controlling section (109) that controls a gain of the variable gain amplifier (107); a propagation environment judging section (110) that judges a propagation environment level of the wireless signal, and a time constant controlling section (112) that controls a time constant, based on the judged propagation environment level such that the time constant becomes larger as the propagation environment level becomes lower, the time constant regulating a change speed of the gain at the variable gain amplifier (107).
IPC 8 full level
H03G 3/30 (2006.01)
CPC (source: EP US)
H03G 3/3052 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2104226 A2 20090923; EP 2104226 A3 20110406; EP 2104226 B1 20120627; JP 2009232089 A 20091008; JP 4911088 B2 20120404; US 2009239481 A1 20090924; US 8311500 B2 20121113
DOCDB simple family (application)
EP 08165940 A 20081006; JP 2008074124 A 20080321; US 24674008 A 20081007